About this site

This is the companion site for the book
Real-Time Collision Detection
by Christer Ericson (Morgan Kaufmann, 2005). You can find an errata linked from the left of
the screen. If you have corrections for either text or code, please email them to me at:
christer 'at-sign' realtimecollisiondetection.net.

Update - 6/16/07

In an attempt to remedy the very infrequent updates here, I've
set up a blog
where I will try to make more frequent updates and talk about things not just
related to my book and to collision detection.

See you there!

Update - 6/15/07

A long overdue update! First, I talked at GDC 2007, again as part of the physics
tutorial session. I repeated my talk on numerical robustness but I also covered
the separating-axis test. Slides from both presentations are on my
publications page.

God of War II
shipped back in March to rave reviews! I think everyone who
worked on it agrees that it is a superior game to the first one.
The Sony Santa Monica Studio is now busy working on a PlayStation 3
title. We have several job openings available,
so if you would like to work with our mega-talented team, check them out, or
email your resume directly to
gow_jobs@playstation.sony.com.

Unfortunately, some additional errors also made it into the errata page since the previous update.

Update - 3/26/06

The GDC 2006 tutorial session was last week and I've uploaded the slides to my
publications page.
The other presentations from the Physics for Games Programmers tutorial will be
linked from Jim Van Verth's page.

In other news: Real-Time Collision Detection has gone into a second printing.
This printing incorporates the corrections on the errata page. Also,
God of War
recently made it into the PlayStation 2 Greatest Hits and is now only $20. Best $20 you'll
ever spend!

Update - 12/20/05

The page has gone without an update for much too long. Now that it's Christmas time and I
have time off from work, I guess I really don't have any more excuses for not updating, so, well,
here's an update!

Aside from my decent sushi vocabulary and being able to decode katakana at a snail's pace,
I know absolutely no Japanese. Nihongo wakarimasen, in other words. Still, from the correspondence
I had with Tatsuya I'm quite certain it's a solid translation. It's very cool holding the Japanese
edition in my hands, but I must admit that looking through it feels a bit weird: it certainly
doesn't feel like I wrote the book!

Second, I'm talking at GDC (in 2006), again. This time as one of the lecturers of the
Physics for Games Programmers
full-day tutorial on Monday. The tutorial is a slight twist on the math tutorial that Jim Van Verth
has been holding the last few years, only this time the focus is on physics only. It's going to be
pretty cool, with expert speakers talking on their favourite topics!
Jim Van Verth's blog has a little more info on
who speaks about what, for those who are curious.
If you are at GDC for the first two tutorial days (and not just going Wednesday-Friday), check it out!

Update - 7/20/05

Erwin Coumans sent me a note that he has released a continuous collision
and physics SDK, called Bullet. It's using the GJK subalgorithm
from my book for finding the point of minimum norm on a simplex.

Erwin has also
set up a forum dedicated to the discussion of physics and (continuous) collision
detection in general. You can find it here:
continuous physics forum.

Update - 6/23/05

God of War has been out for
about 3 months now and it is a huge critical success. We are now busy working on our next title and we
are hiring in just about any discipline:

Programming

Animation

Design

Concept Art

Character Art

Environment Art

If you think you got the skills and want to be a part of an incredibly talented and
successful team, email your resume to
gow_jobs@playstation.sony.com.

Update - 3/12/05

I just got back from San Francisco and GDC 2005, where I talked on the issue of Numerical Robustness for
Geometric Calculations. As promised, I've uploaded my talk slides on this website.
Specifically, the PowerPoint slides are available for download from my
publications page.

It's always fun being at GDC, going to lectures and meeting new people. It was especially great getting
a lot of positive feedback both on the talk and on my book! Thanks all!

Update - 2/27/05

In this update I made the
references
from the book available online, allowing all the links to various papers and books to be
clicked through (rather than tediously typed in). Please report any stale links!
I also updated the
errata
(with a code bug reported by Swaminathan Narayanan).

Finally, the game our studio has been working on for the last few years is finally done
and will be available in the stores March 22, 2005. It's called
God of War and we have some fantastic buzz going for the game already, because,
well, it's a fantastic game, that's why! Don't trust me? Then check out the
official website
or the
Gamespot previews
(specifically check out the various
gameplay videos
and see if you can resist
preordering the game!).

Update - 2/6/05

Updated the
errata
(with a code bug reported by Mark Wayland). Added an
endorsement quote by Eric Haines
which sadly didn't make it into the book. Prompted by Eric I also recently updated my list of
recommented books. (Some day I'll
have time to fully update the list, but not today.) Last but not least, I just recently noticed that
someone
reviewed my book over at
amazon.co.uk, giving it 5 stars. Whee!